bwi is the best by a long shot, imo. not the easiest to access but by far the most functional. and it's not HARD to get to and from, just takes a little more time. there are plenty of cheap ways to do it. you can take the shuttle to the metro station in greenbelt and then go directly to dupont. or you can take the amtrak to union station and then metro to dupont. or you can take a bus the whole way. it's easy and way way cheaper than a cab.

it really depends on how much time you have. do you have 1-2 hours to spare to get to/from BWI or Dulles?

if you don't have the two hours to travel, then choose Reagan. Even using a shuttle to greenbelt (or MARC/amtrak) and metro in, or the bus, still going to take 1-2 hours time depending on traffic and lateness of trains, etc.

You can just as easily take a shuttle or bus from Dulles to Tysons Metro and then metro into DuPont from Tysons. None of them are hard to get to/from, just time consuming. IMO, all 3 are functional and all 3 are easy to get to/from... BWI and Dulles take the longest to commute to/from.. Regan the easiest in all aspects.. .its least amount of time from airport to hotel/conference, its functional (easy to maneuver around), and its closest (by ~30 miles) to where you will be.

There are 10 types of people in the world, those that understand binary and those that don't

Reagan is the family favorite. My aunt lived there for 40+ years and was always very adamant about using Reagan.

“It has been said, 'time heals all wounds.' I do not agree. The wounds remain. In time, the mind, protecting its sanity, covers them with scar tissue and the pain lessens. But it is never gone.”
― Rose Kennedy